Air purifier



FIG. 1 is a perspective view of an air purifier showing my new design;

FIG. 2 is another perspective view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a right side elevation view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

The broken line portions of the air purifier in FIGS. 1-8 represent unclaimed portions of the claimed design and form no part thereof. 

CLAIM The ornamental design for an air purifier, as shown and described. 